Safety-trolley.



No. 758,592. PATENTED APR. 26, 1904. W. M. GRUNBR & W. C. PINK.

SAFETY TROLLEY.

APPLIGATION FILED Nov. 5, 190s.

2 SHEETS-SHEET 1.

N0 MODEL.

w27/m5525155 m a E! me Noms Ps'rsns cc.. naamw wgsmnmow. n. c,

. VNo. 758,592.

N0 MODEL. 2 SHEETS-SHEET 2.

A TTOHNE YS APPLICATION FILED NOV. 5. 1903.

special means whereby the motor-circuit is Patented April 26, 1904.

UNITED STATES PATENT @Erice WILLIAM M. GRUNER AND IVILLIAM C. FINK, OF SPRINGDALE, lPENN- SYLVANIA, ASSIGNORS OF-ONE-FOURTH TO HENRY G. G. FINK, 0F

SPRINGDALE, PENNSYLVANIA.

SAFETY-TROLLEY SPECIFICATION forming part of Letters Patent No. '7 58,592, dated April 26, 1904, y

Application filed November 5, 1903.-

To a wil/0m, it Wto/,y concern:

Be it known that we, WILLIAM M. GRUNER and WILLIAM C. FINK, citizens of the United States, and residents of Springdale, in the county of Allegheny and State of Pennsylvania,- have invented a new and Improved Safety-Trolley, of which the followingl is a specification.

i Our invention relates, more definitely stated, to a peculiar subtrolley adapted Jfor catching the conductor-wire upon breakage of the maintrolley sheave or jumping thereof from the conductor wire, the subtrolley being alsov adapted for holding the main trolley lowered or out of contacting position with the conductor-wire supports and at the same time through suitable circuit-closers recornplete the motor-circuit and the sounding of an alarm in a local circuit on the motor-car.

The invention consists of the special construction, arrangement, and combination of features which will hereinafter be fully described and the points of novelty pointed out in the claims.

Our invention is illustrated in the accompanying drawings, which form a part of this specicatio-n.

In the drawings, Figure 1 is a view illustrating our invention in'use. Fig. 2 is an enlarged detail View of the main and sub trolleys, partly broken away. Fig. 3 is a similar view showing the subtrolley in action. Fig. 4 is a detail view of the subtrolley-head looking in direction of the arrow in Fig. 2. Fig. 5 is a transverse section through the main and sub trolleys, taken on line 5 5 of Fig. 2 and lookingvv in direction of the arrow. Fig. 6 is a transverse sectional view through a moditied form of the subtrolley.

In the embodiment of our invention we employ with the ordinary trolley of a motor-car a subtrolley normalhT held out of action and recompleted by the subtrolley upon its contact with the conductor-wire. Our invention comprehends supplemental means operating Serial No. 179,926. (No model.)

simultaneously with the subtrolleys action to close .a local alarm-circuit on the car.

In carrying out .our invention we employ a subtrolley A with any form of main trolley B. The subtrolley is -made endwise extensible and constructed into two or more sections,

.which may have telescoping or other similar action adapted for the purpose of our invention. In the drawings and as illustrating one form thereof we show it constructed in two sections C and D, the section C being formed of a length of tubing having itsV lower end hinged to a bracket E on the main trolley arm suitably below its head and sheave F. At

-the base or hinged end of the subtrolley we employ two circuit-closers G and H, the

Y former being in the motor-circuit I and the latter in a local alarm-circuit J on the car.

- The circuit-closers Gr and H, may be of any approved type adapted Jfor vrthe purpose whosel contacts K L shall-stand normally open when the subtrolley is out of action. It will be noticed that the contacts K of` the closer G consist of simple conductive surfaces next below they hinge connection of the subtrolley, onethereof being on the main-trolley pole and the other on the subtrolley-base M. 'Ihe contacts L of the closer H are located still lower down, and both thereofl are on the main trolley. The contacts L of the alarm-circuit arev intended to stand yieldingly open and adapted to be closed by an insulated extension N of the subtrolley-base M.

It will be noticed that the subtrolley eX- tends upward through an elongated loop O, consisting of a Xedly-located lateral projection on the main trolley, and that itis arranged adapted for carrying its elongated sheave P slightly in rear of and just free Jfrom proper working position ofA the main-trolley sheave. In its normal position,with the sections C and D contracted or telescoped, the subtrolleysheave is carried suitably below the conductorwire Q, adapted to ride free from engagement with the conductor-wire supports and other projections along its line.

R denotes a peculiar bracket or lateral projection Vlixedly located on the main trolley and suitably above the loop O. It is formed with forked arms S, adapted to straddle the upper section D of the subtrolley, as shown.

In one form of the subtrolley A its section C may consist of a length of tubing having a circular or angular socket T and the section D be of corresponding shape. In our drawings the section D is shown round in crosssection and is prevented turning action in the socket T by being provided with a lengthwise spline U, guided in a suitable slot in the inturned liange V on the upper end of the lower section C. In the socket T we arrange an expanding spring W, intended for forcing the section D outwardly to extended position with respect to its contracted telescoped position into the section C. In our drawings we show the section D held telescoped to contracted position by lateral pins a engaging the under side of the forked arms of the bracket R. The pins ay are yieldingly held under the bracket-arms R by a spring b ou the section C of the subtrolley, having its free end in engagement with the outer inner side of the loop O.

Obviously the parts above described may be variously modified without departing from the spirit of our invention, which comprehends the broad idea of a combined main and su trolley wherein the subtrolley is adapted for lengthwise extension.

Our invention will be understood from the above description. In its use the section D of the subtrolley is normally carried locked down and with the subtrolley-sheave just below the conductor-wire Q, as shown in Fig. l. Now should the main trolley leave the conductor-wire, as by jumping action or due to breakage of its sheave or other cause, the subtrolley-sheave will instantly engage the conductor-wire and through pressure exerted by the main-trolley support be forced backward on its hinge connection. Obviously this action of the subtrolley will carry the pins a on the section D rearward from holding position under the forked bracket-arms R, when the spring W will instantly force out the section D to extended position, and thereby, in

effect, lengthen the main trolley. When in operative use, the subtrolley is held yieldingly extended by the spring W.

With the subtrolley in use as just described it is intended that the upper end or head of the main trolley shall be carried at lowered position and free from liability to engagement with the conductor suspension wires or supports. It will be further noticed that when the subtrolley is forced backward from its normal or inoperative position its lower end will recomplete the motor-circuit through the contacts K of the circuit-closer (nr. Simultaneously therewith the alarm on the car will be sounded through completion of its circuit by pressure of the subtrolley extension N against the contacts L of the circuit-closer H.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is-

1. The combination with the main trolley, of a lengthwise-extendible subtrolley, and means operating upon extending action of the subtrolley, to recomplete the motor-circuit, substantially as described.

2. The combination with the main trolley. of a lengthwise-extendible subtrolley, and means operating upon extending action of the subtrolley, to recomplete the motor-circuit, and at the same indicate action of the subtrolley, through closure of a local circuit on the motor-car, substantially as described.

3. The combination with the main trolley, of a lengthwise-extendible subtrolley, hingeacting subtrolley-supporting means at the lower end thereof, the subtrolley being constructed of a series of telescoping sections under spring-pressure when telescoped, means operating, in normal position of the subtrolley, for holding its sections telescoped, and means operating upon extending action of the subtrolley, to recomplete the motor-circuit, and at the same time indicate action of the subtrolley through closure of a local circuit on the motor-car, substantially as described.

WILLIAM M. GRUNER. WILLIAM (j. FINK. Witnesses:

S. G. BARNES, PAULINE R. CURTIS. 

